<> user management
1. newly added ：adduser name
2. password ：passwd name
3： delete user ：userdel name
Wrote a simple code
nano It's just a notepad , Exit is ctrl x
<>which
which ls
View the path of a specific instruction
<>stat
View time
<>cal
Show calendar
<>find
find -name
Find specific files ,
<>zip/unzip
Packaging and compression
grammar ：zip Compressed file .zip Directory or file
function ： Package directories or files into zip format
-r Is recursive processing
take test Directory compression zip test.zip test/*
Compress to tmp In the catalogue ,
Compress ordinary files
decompression
Compressed directory
Extract directory
unzip -d Can be assigned to a specific path
Unzip to home Under the directory
<>tar
pack / compress , Don't open him , Read the content directly
-c Create a compressed file （creat）
-z Whether to compress it
-f Followed by file name
-v Decompression process display file
-x decompression
-C Extract to a specific path
compress
Packaging and compression
： Packing is to put the size together
Compression is to reduce space
<>bc
linux It acts as a calculator
shell
Command Line Interpreter （ as windows Graphical interface system based on ）
bash yes shell There is a specific user shell
Technology
Daily Recommendation